- 您現在的位置：買賣IC網 > PDF目錄10555 > MAX132EWG+ (Maxim Integrated Products)IC ADC 18BIT SERIAL 24-SOIC PDF資料下載
參數資料
| 型號： | MAX132EWG+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 15/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 18BIT SERIAL 24-SOIC |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 30 |
| 位數： | 18 |
| 采樣率（每秒）： | 100 |
| 數據接口： | MICROWIRE?，串行，SPI? |
| 轉換器數目： | 1 |
| 電壓電源： | 雙 ± |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸入數目和類型： | 1 個偽差分，雙極 |
| 產品目錄頁面： | 1393 (CN2011-ZH PDF) |
MAX132
±18-Bit ADC with Serial Interface
8
_______________________________________________________________________________________
Differential Reference Inputs
and Rollover Error
The main source of rollover voltage error is due to
common-mode voltages. This error is caused by the
reference capacitor losing or gaining charge to stray
capacitance. A positive signal with a large common-
mode voltage can cause the reference capacitor to
gain charge (increase voltage). In contrast, the refer-
ence capacitor will lose charge (decrease voltage)
when deintegrating a negative input signal. Rollover
error is a direct result of the difference in reference to
positive or negative input voltages. With the recom-
mended reference capacitor types, the worst-case
rollover error is 0.01% of full-scale. Connect REF- to
AGND to minimize rollover error. As outlined in the ref-
erence section, reference voltages below 500mV also
contribute to rollover errors.
Oscillator Circuit
The internal oscillator is typically driven by a crystal, as
shown in Figure 8, or by an external clock. If an exter-
nal clock is used, connect the clock to OSC1 and leave
OSC2 floating. The duty-cycle can vary from 20% to
80%. The typical threshold voltage is approximately 2V.
For proper start-up, a full +5V CMOS-logic swing is
required.
The oscillator frequency sets the conversion rate. Use
32,768Hz for applications that require 50Hz or 60Hz
line rejection. This frequency yields 16 conv/sec. The
same clock frequency can be used to reject both line
frequencies because the MAX132 integrates for a dif-
ferent number of clock cycles in its 50Hz and 60Hz
modes. In each case, the MAX132 integrates for a sin-
gle complete line cycle (20ms for the 50Hz mode,
16.67ms for the 60Hz mode). Refer to the
Increased
Speed section for operation at higher conversion rates.
External Components
The MAX132 requires an integrator resistor (RINT) and
capacitor (CINT), a reference capacitor (CREF), and a
crystal. All MAX132 tests are performed with a
32,768Hz crystal frequency. The crystal frequency, ref-
erence voltage, and integrator current determine the
values of RINT and CINT.
Crystal
Figure 8 shows the internal oscillator drive circuitry used
with external crystals. The two external capacitors provide
DC bias at start-up. The 15pF capacitors shown are typical
values. The actual capacitance will vary, depending on the
crystal manufacturer’s recommendation and board layout.
150k
15pF
5pF
1M
+5V
65
OSC1
OSC2
MAX132
Figure 8. MAX132 Internal Oscillator Drive Circuitry
MAX132
V+
+5V
-5V
IN HI
IN LO
15
14
24
13
+545mV
100k
0.1
F
±512mV
16
18
17
AGND
REF-
REF+
V-
Figure 6. MAX132 Input Circuit
REF+
REF-
1
F
120k
100k
40.2k
2.5V
MAX872
+5V
Figure 7. Dividing MAX872 to Generate the MAX132’s
Reference Voltage
相關PDF資料 |
PDF描述 |
|---|---|
| VI-JT3-MW-S | CONVERTER MOD DC/DC 24V 100W |
| MAX1186ECM+D | IC ADC 10BIT 40MSPS DL 48-TQFP |
| VI-JTF-MW-F1 | CONVERTER MOD DC/DC 72V 100W |
| AD7690BCPZRL7 | IC ADC 18BIT 400KSPS 10-LFCSP |
| VI-JT4-MW-S | CONVERTER MOD DC/DC 48V 100W |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX132EWG+ | 功能描述:模數轉換器 - ADC 18-Bit .1ksps .545V Precision ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX132EWG+T | 功能描述:模數轉換器 - ADC 18-Bit .1ksps .545V Precision ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX132EWG-T | 功能描述:模數轉換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX132MRG | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1330 | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
發(fā)布緊急采購，3分鐘左右您將得到回復。